Implement gen command, to generate samples.

Cargo.toml

@@ -22,3 +22,4 @@ rpassword = "7.2.0"
 shlex = "1.1.0"
 shellexpand = "3.0.0"
 scopeguard = "1.1.0"
+rand = "0.8.5"

src/commands.rs

@@ -5,10 +5,13 @@ use std::collections::{HashMap, HashSet};
 use std::fs;
 use std::io::{BufRead, BufReader};
 use std::io::{BufWriter, Write};
+use std::rc::Rc;
+use std::cmp::min;
+use rand::{thread_rng, Rng};
 
 use crate::parser::command_parser;
 use crate::password::fix_password_recursion;
-use crate::password::{Name, PasswordRef};
+use crate::password::{Name, Password, PasswordRef};
 use crate::repl::LKEval;
 use crate::structs::{LKOut, Radix, CORRECT_FILE, DUMP_FILE};
 use crate::utils::{call_cmd_with_input, get_cmd_args_from_command, get_copy_command_from_env};
@@ -409,4 +412,47 @@ impl<'a> LKEval<'a> {
             Err(e) => out.e(format!("error: failed to write: {}", e.to_string())),
         };
     }
+
+    pub fn cmd_gen(&self, out: &LKOut, num: &u32, name: &PasswordRef) {
+        lazy_static! {
+            static ref RE: Regex = Regex::new(r"^.+?(G+|X+)$").unwrap();
+        }
+        let mut rng = thread_rng();
+        let num: usize = (*num).try_into().unwrap();
+        let pwd = name.borrow();
+        let secret = "a".to_string();
+        let mut genpwds: Vec<(PasswordRef, String)> = Vec::new();
+        match RE.captures(pwd.name.as_ref()) {
+            Some(caps) => {
+                let gen = &caps[1];
+                if gen.starts_with("G") {
+                    let name = pwd.name.trim_end_matches('G');
+                    for num in 1..10_u32.pow(gen.len().try_into().unwrap()) {
+                        let npwd = Password::from_password(&pwd);
+                        npwd.borrow_mut().name = Rc::new(format!("{}{}", name, num).to_string());
+                        let pass = npwd.borrow().encode(&secret);
+                        genpwds.push((npwd, pass));
+                    }
+                } else {
+                    let name = gen.trim_end_matches('X');
+                    let num = rng.gen_range(1..10_u32.pow(gen.len().try_into().unwrap()));
+                    let npwd = Password::from_password(&pwd);
+                    npwd.borrow_mut().name = Rc::new(format!("{}{}", name, num).to_string());
+                    let pass = npwd.borrow().encode(&secret);
+                    genpwds.push((npwd, pass));
+                }
+            }
+            None => {
+                let npwd = Password::from_password(&pwd);
+                let pass = npwd.borrow().encode(&secret);
+                genpwds.push((npwd, pass));
+            }
+        }
+        genpwds.sort_by(|a, b| b.1.len().cmp(&a.1.len()));
+        out.o(format!("{:>30}{:>4} {}", "Name", "Len", "Password"));
+        for num in (genpwds.len()-min(genpwds.len(), num))..genpwds.len() {
+            let (pwd, pass) = (genpwds[num].0.borrow(), genpwds[num].1.to_string());
+            out.o(format!("{:>30}{:>4} {}", pwd.to_string(), pass.len(), pass));
+        }
+    }
 }

src/parser.rs

@@ -21,6 +21,7 @@ peg::parser! {
             / dump_cmd()
             / dump_def_cmd()
             / enc_cmd()
+            / gen_cmd()
             / pass_cmd()
             / unpass_cmd()
             / correct_cmd()
@@ -51,12 +52,14 @@ peg::parser! {
             match name { Some(n) => Ok(n), None => Err("failed to parse password description") }
         }
 
-        rule date() -> NaiveDate = y:$("-"? ['0'..='9']*<1,4>) "-" m:$(['0'..='9']*<1,2>) "-" d:$(['0'..='9']*<1,2>) {?
+        rule ndate() -> NaiveDate = y:$("-"? ['0'..='9']*<1,4>) "-" m:$(['0'..='9']*<1,2>) "-" d:$(['0'..='9']*<1,2>) {?
             let year:  i32 = match y.parse() { Ok(n) => n, Err(_) => return Err("year") };
             let month: u32 = match m.parse() { Ok(n) => n, Err(_) => return Err("month") };
             let day:   u32 = match d.parse() { Ok(n) => n, Err(_) => return Err("day") };
             NaiveDate::from_ymd_opt(year, month, day).ok_or("date")
         }
+        rule cdate() -> NaiveDate = "now" { Local::now().naive_local().date() }
+        rule date() -> NaiveDate = d:(ndate() / cdate()) { d }
         rule umode() -> Mode = ("U" / "u") m:$("R" / "r" / "N" / "n" / "H" / "h" / "B" / "b") {?
             match m.to_uppercase().as_str() {
                 "R" => Ok(Mode::RegularUpcase),
@@ -88,6 +91,9 @@ peg::parser! {
         rule source_cmd() -> Command<'input> = "source" _ s:$(([' '..='~'])+) { Command::Source(s.to_string()) }
         rule ls_cmd() -> Command<'input> = "ls" f:comment()? { Command::Ls(f.unwrap_or(".".to_string())) }
         rule add_cmd() -> Command<'input> = "add" _ name:name() { Command::Add(Rc::new(RefCell::new(name))) }
+        rule gen_cmd() -> Command<'input> = "gen" n:num()? _ name:name() {
+            Command::Gen(match n { Some(n) => n, None => 10_u32 }, Rc::new(RefCell::new(name)))
+        }
         rule error_cmd() -> Command<'input> = "error" _ e:$(([' '..='~'])+) { Command::Error(LKErr::Error(e)) }
         rule mv_cmd() -> Command<'input> = "mv" _ name:word() _ folder:word() { Command::Mv(name, folder) }
         rule pass_cmd() -> Command<'input> = "pass" _ name:word() { Command::Pass(name) }

src/password.rs

@@ -47,6 +47,19 @@ impl Password {
         }
     }
 
+    pub fn from_password(password: &Password) -> PasswordRef {
+        Rc::new(RefCell::new(Self {
+            parent: password.parent.clone(),
+            prefix: password.prefix.clone(),
+            name: password.name.clone(),
+            length: password.length.clone(),
+            mode: password.mode.clone(),
+            seq: password.seq,
+            date: password.date.clone(),
+            comment: password.comment.clone(),
+        }))
+    }
+
     pub fn encode(&self, secret: &str) -> String {
         let skey = SKey::new(&self.name, self.seq, secret);
         let (sep, len) = match (&self.length, &self.mode) {

src/repl.rs

@@ -106,9 +106,8 @@ impl<'a> LKEval<'a> {
                 }
                 None => out.e(format!("error: password {} not found", name)),
             },
-            Command::Enc(name) => {
-                self.cmd_enc(&out, name);
-            }
+            Command::Enc(name) => { self.cmd_enc(&out, name); }
+            Command::Gen(num, name) => self.cmd_gen(&out, &num, &name),
             Command::PasteBuffer(command) => self.cmd_pb(&out, command),
             Command::Source(script) => self.cmd_source(&out, script),
             Command::Dump(script) => self.cmd_dump(&out, script),

src/structs.rs

@@ -60,6 +60,7 @@ pub enum Command<'a> {
     Mv(Name, Name),
     Rm(Name),
     Enc(Name),
+    Gen(u32, PasswordRef),
     Pass(Name),
     UnPass(Name),
     Correct(Name),
@@ -74,7 +75,7 @@ pub enum Command<'a> {
     Quit,
 }
 
-#[derive(PartialEq, Debug)]
+#[derive(PartialEq, Debug, Clone)]
 pub enum Mode {
     Regular,
     RegularUpcase,